What usually ends its life
ABS modules fail as electronics (internal circuitry), as pump/solenoid control issues, or through communication faults. Typical symptoms include warning lights and stability/traction control issues; stored codes may point to pump motor/solenoid circuits tied back to the module’s control function.
Replace it when you see
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ABS warning light that returns after wheel speed sensors, wiring, and power/grounds check out
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Multiple ABS-related codes (especially pump/solenoid control codes) persisting after peripheral verification
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Intermittent communication with the module that repeats across resets and verified harness integrity
The replacement line
When diagnostics keep pointing back to the module after sensor/harness validation, replacement beats endless parts-swapping—because the ABS module is literally the system’s decision-maker.